Turbine-pump



A. C. DOUGLASS.

TURBINE PUMP.

APPLICATION FILED APR. 19, 1920.

1 96,820, 7 Patented Nov. 15, 1921.

2 SHEETS-SHEET 1,.

INVENTOR A.c. oousmss,

TURBINE PUMP.

APPLICATION HLED APR. 19. I920.

1,396,820, Patented Nov. 15,1921.

2 SHEETS-SHEET 2.

F3 IN VENTOR UNITED STATES PATENT OFFICE.

TURBINE-PUMP.

Specification of Letters Patent.

Patented Nov. 15, 1921.

Application filed April 19, 1920. Serial No. 375,069.

To all whom it may concern:

Beit known that 1, ANDREW C. DOUGLASS, a citizen of the United States, residing at Sonoma, in the county of Sonoma and State of California, have invented a new and useful Turbine-Pump, of which the following is a specification.

My invention relates to improvements in turbine pumps and its object is to overcome the downward thrust of the shaft.

I accomplish this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a vertical section through the pump,

Fig. 2 a horizontal section along line 2-2 of Fig. 1,

Fig. 3 a horizontal section along line 3-3 of Fig. 1,

Fig. 4 a horizontal section along line L L of Fig. 1, I r

Fig. 5 a detail View of the umbrella shaped web and blades, looking at them from underneath,

Fig. 6 a detail view ofa bearing for the shaft.

Similar numerals refer to similar parts throughout the several views.

1 represents the well easing into which is let the pump casing 2, consisting of an upper part 3 and a lower part 4. The lower end of part 3 and the upper end of part 4 are enlarged and provided with corresponding flan es 6, which are bolted together by bolts 7. Vhen joined the two parts 3 and 4 form at their juncture chamber 8 of a shape closely resembling a toy top.

The top of the upper part 3 of the pump casing is covered by a housing 9, consisting of an upper partll and a lower part 12. The upper part 11 is umbrella shaped and provided with a flange 14 at the bottom which corresponds to a flange 15 of the en larged upper end of part 12 of the housing 9; by joining the flanges 14 and 15 the chamber 17 is formed. The lower end of part 12 is cylinder shaped and of a diameter considerably larger than that of the pump casing 2 and is closed at the bottom, an opening being left in the center for pump casing 2 to pass through. The fit of the bottom of part 12 around the pump casin is sung and watertight, as shown at 10. ome distance above its bottom part 12 is provided with a discharge pipe 21. The umbrella shaped part 11 has a central embossed opening 22 to allow the shaft 25 to extend through it. Some distance above said opening the shaft 25 is provided with pulley '33, by means of which it may be connected with any suitable source of power.

he bottom end of shaft 25 runs out into an enlargement of the shape of a toy top. This enlargement is centrally located with reference to chamber 8 of pump casing 2 and serves as a hub 24 for three propeller blades 26, which are slightly curved on top, pointed at the bottom, and the outer edges of which run parallel and in close proximit to the curve of the chamber 8. The blades are curved and their concave sides grip the water and carry it upward.

Immediately above but not touching the curved tops of the propeller blades are three stationary bafiles 27 with curved bottoms corresponding to thecurved tops of thepropeller blades 26, which bafiies gradually change the curved path of the water along the propeller blades into a straight vertical one. The bafil'es are rigidly secured to the pump casing and form a centrally located hub 28, in which shaft 25 rotates. The latter is prevented from sliding down by a collar 13 which rotates on steel balls 19 running in a groove 20 formed within the hub 28.

Above and near the top of the pump casing the shaft 25 carries a conical. shaped hub 30 to which three propeller blades 29 are attached. These resemble in their shape somewhat the blades 26, but are turned upside down, have an opposite lead, and their main working parts reach outside of and below the top of pump casing 2. They turn with the shaft 25, but are intended to work the opposite way from blades 26, that is, while blades 26 carry water upward within pump casing 2, the blades 29 simultaneously force water downward outside the casing 2, but within the housing 11. The outer edges of the blades 29 are curved to follow the lines of the umbrella shaped housing 11 and are connected with each other by a web 31 which also follows the lines of housing 11.

The pump works as follows: The water is lifted by propeller blades 26 into the upper part of pump casing 2 until it reaches the umbrella shaped web 31; here it is en gaged by the revolving blades 29 which force the water outward and downward into the passage between pump casing 2 and houslng 9. The downward pressure exerted upon the water sets free an equal upward pressure in the water, tending to lift the Web 31 and with it the shaft 25, which lifting tendency, provided the sizes of the blades and the two chambers are properly proportioned, is strong enough to balance the downward thrust of the load within the pump casing 2; the blades 29 further serve to give the water an extra impetus, especially where it has to be carried through a line of pipes, as in surface irrigation.

The overcoming of the downward thrust being the principal feature of my invention I do not confine myself to the particular impeller described in the specification. Neither do I confine myself to any particular number of blades.

I claim: 7

1. In a pump the combination of a casing having a toy top shaped chamber intermediate of its length, a housing having an umbrella shaped top adapted to inclose the upper part of the casing so as to leave a passage between said casing and said housing, a discharge from said passage, a vertical shaft extending centrally through said casing. and said housing, means for ositioning and driving the same, a water li ting means within the toy top shaped chamber and a means in'the umbrella shaped top for forcing water downward into the passage, adapted to be driven by said shaft.

2. In a pump the combination of a casing having a toy top shaped chamber intermediate of its length and stationary bafiles ber and a means in the umbrella shaped top for forcing water downward into the passage, adapted to be driven by said shaft.

3. In a pump the combination of a casing comprising an upper part and a lower part forming a toy top shaped chamber at the junction and having stationary bailles above said junction, a housing comprising an upper and a lower part adapted to watertightly inclose the upper part of the casing so as to leave a passage between the casing and the housing and to form an umbrella shaped chamber above the same at their junction, and a vertical shaft extending centrally through the casing and housing having a toy top shaped hub at the bottom with a plurality of lifting blades mounted thereon and an umbrella shaped web at the top with a plurality of blades mounted therein adapted to force water downward into the passage between the casing and the housing.

'ANDREIV C. DOUGLASS. 

